A group of researchers led by the University of Tokyo has broken Internet speed records—twice in two days. Operators of the high-speed Internet2 network announced Tuesday that the researchers on Dec. 30 sent data at 7.67 gigabits per second, using standard communications protocols.

The next day, using modified protocols, the team broke the record again by sending data over the same 20,000-mile path at 9.08 Gbps.